New DWARF 5 sections?

[Sebastian Huber]

Hello,

I use a linker script which adds all unexpected sections into a memory 
region of length 0:

MEMORY {
     UNEXPECTED_SECTIONS : ORIGIN = 0xffffffff, LENGTH = 0
}

SECTIONS {

...

     .unexpected_sections : { *(*) } > UNEXPECTED_SECTIONS
}

It seems there are some new debug sections produced by GCC 11 which uses 
DWARF 5 by default such as:

  .debug_loclists
  .debug_rnglists
  .debug_line_str

These sections are not covered by the default linker script for example 
on arm (and other targets):

arm-rtems7-ld --verbose
GNU ld (GNU Binutils) 2.36.50.20210122
   Supported emulations:
    armelf
using internal linker script:
==================================================

...

   /* Stabs debugging sections.  */
   .stab          0 : { *(.stab) }
   .stabstr       0 : { *(.stabstr) }
   .stab.excl     0 : { *(.stab.excl) }
   .stab.exclstr  0 : { *(.stab.exclstr) }
   .stab.index    0 : { *(.stab.index) }
   .stab.indexstr 0 : { *(.stab.indexstr) }
   .comment       0 : { *(.comment) }
   .gnu.build.attributes : { *(.gnu.build.attributes 
.gnu.build.attributes.*) }
   /* DWARF debug sections.
      Symbols in the DWARF debugging sections are relative to the beginning
      of the section so we begin them at 0.  */
   /* DWARF 1 */
   .debug          0 : { *(.debug) }
   .line           0 : { *(.line) }
   /* GNU DWARF 1 extensions */
   .debug_srcinfo  0 : { *(.debug_srcinfo) }
   .debug_sfnames  0 : { *(.debug_sfnames) }
   /* DWARF 1.1 and DWARF 2 */
   .debug_aranges  0 : { *(.debug_aranges) }
   .debug_pubnames 0 : { *(.debug_pubnames) }
   /* DWARF 2 */
   .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
   .debug_abbrev   0 : { *(.debug_abbrev) }
   .debug_line     0 : { *(.debug_line .debug_line.* .debug_line_end) }
   .debug_frame    0 : { *(.debug_frame) }
   .debug_str      0 : { *(.debug_str) }
   .debug_loc      0 : { *(.debug_loc) }
   .debug_macinfo  0 : { *(.debug_macinfo) }
   /* SGI/MIPS DWARF 2 extensions */
   .debug_weaknames 0 : { *(.debug_weaknames) }
   .debug_funcnames 0 : { *(.debug_funcnames) }
   .debug_typenames 0 : { *(.debug_typenames) }
   .debug_varnames  0 : { *(.debug_varnames) }
   /* DWARF 3 */
   .debug_pubtypes 0 : { *(.debug_pubtypes) }
   .debug_ranges   0 : { *(.debug_ranges) }
   /* DWARF Extension.  */
   .debug_macro    0 : { *(.debug_macro) }
   .debug_addr     0 : { *(.debug_addr) }
   .ARM.attributes 0 : { KEEP (*(.ARM.attributes)) KEEP 
(*(.gnu.attributes)) }
   .note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }
   /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }
}

Are these sections missing?

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